temperature simulation of transistors

[Barifrah]

Hi there!​

I started to play with temperature simulation of small analog circuit (including two PNPs, PN2907). ​

In temperature 25 deg I get the same results. If I change simulated temperature (let say to 50 deg), I get different results ...
Is it possible or am I doing something wrong? Which software is ​

Any help will be appreciated!
tnx,BAR​

​

 

[dick_freebird]

Not possible - certain. That's the simulator's
job, to produce realistic emulation of various
environmental and circuit effects. Temperature
being a big one.

Of course garbage in, garbage out, as they say.
You need the right temperature fitting params
properly set, to get realistic (as opposed to
mysterious) temperature effects expressed.

 

[Mahmoud_Sofy]

Sure, you must get different results, since both of "Vt" and "Is"of the BJT are functions in temperature. simulators in normal simulations run at 25 or 27 deg -depending on your simulator- , so when you set temp to 25 deg you really changed nothing in your simulation.